FURVERT!

anal anal_penetration anatomically_correct anatomically_correct_genitalia anatomically_correct_penis animal_genitalia animal_penis balls black_nose brown_body brown_eyes brown_fur canid canine canine_genitalia canine_penis canis countershading dipstick_tail domestic_dog dominant duo erection feral feral_on_feral feral_penetrated feral_penetrating feral_penetrating_feral from_behind_position fully_sheathed fur genitals german_shepherd herding_dog knot male male/male male_penetrated male_penetrating male_penetrating_male mammal markings mounting multicolored_tail nude pastoral_dog penetration penis quadruped red_penis sex sheath sheathed_while_penetrated tail tail_markings vailwolf white_body white_countershading white_fur